﻿/*
 * MIT License
 *
 * Copyright (c) 2018 Clark Yang
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of 
 * this software and associated documentation files (the "Software"), to deal in 
 * the Software without restriction, including without limitation the rights to 
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
 * of the Software, and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE.
 */

using System;

namespace Loxodon.Framework.Prefs
{
    public class PrimitiveTypeEncoder : ITypeEncoder
    {
        private int priority = 1000;

        public int Priority
        {
            get { return this.priority; }
            set { this.priority = value; }
        }

        public bool IsSupport(Type type)
        {
#if NETFX_CORE
            TypeCode typeCode = WinRTLegacy.TypeExtensions.GetTypeCode(type);
#else
            TypeCode typeCode = Type.GetTypeCode(type);
#endif

            switch (typeCode)
            {
                case TypeCode.String:
                case TypeCode.Boolean:
                case TypeCode.SByte:
                case TypeCode.Byte:
                case TypeCode.Int16:
                case TypeCode.UInt16:
                case TypeCode.Int32:
                case TypeCode.UInt32:
                case TypeCode.Int64:
                case TypeCode.UInt64:
                case TypeCode.Char:
                case TypeCode.Single:
                case TypeCode.Double:
                case TypeCode.Decimal:
                case TypeCode.DateTime:
                    return true;
            }

            return false;
        }

        public string Encode(object value)
        {
            TypeCode typeCode = Convert.GetTypeCode(value);
            switch (typeCode)
            {
                case TypeCode.String:
                case TypeCode.Boolean:
                case TypeCode.SByte:
                case TypeCode.Byte:
                case TypeCode.Int16:
                case TypeCode.UInt16:
                case TypeCode.Int32:
                case TypeCode.UInt32:
                case TypeCode.Int64:
                case TypeCode.UInt64:
                case TypeCode.Char:
                case TypeCode.Single:
                case TypeCode.Double:
                case TypeCode.Decimal:
                case TypeCode.DateTime:
                    return Convert.ToString(value);
            }

            throw new NotSupportedException();
        }

        public object Decode(Type type, string input)
        {
#if NETFX_CORE
            TypeCode typeCode = WinRTLegacy.TypeExtensions.GetTypeCode(type);
#else
            TypeCode typeCode = Type.GetTypeCode(type);
#endif

            switch (typeCode)
            {
                case TypeCode.String:
                    return input;
                case TypeCode.Boolean:
                case TypeCode.SByte:
                case TypeCode.Byte:
                case TypeCode.Int16:
                case TypeCode.UInt16:
                case TypeCode.Int32:
                case TypeCode.UInt32:
                case TypeCode.Int64:
                case TypeCode.UInt64:
                case TypeCode.Char:
                case TypeCode.Single:
                case TypeCode.Double:
                case TypeCode.Decimal:
                case TypeCode.DateTime:
                    return Convert.ChangeType(input, type);
            }

            throw new NotSupportedException();
        }
    }
}
